sys := diff(y,t$3) + 3*diff(y,t$2) + 5*diff(y,t)  = diff(u,t$3) + diff(u,t$2) + diff(u,t)

x1 = diff(y,t)
x2 = diff(y,t$2)
x3 = diff(y,t$3)

how to do simple parametrization with x1, x2, x3 on sys, so that get 3 equations in terms of x1, x2, x3, u
result may be first order of x1, x2, x3

Dear Maple Users

In Maple 16 I read in the menu Help > What's New that it is now possible to have 3D plots exported as vector graphics, when using EPS export. I tried it, but could not open the resulting EPS file. I used my CorelDRAW 15 Suite ... Can someone tell me how I get access to the exported vector graphics?

If I cannot get it into CorelDRAW, it is not for much use. Maybe an intermediate process?

Regards,

Erik

How to implement the following procedure using the function Maple Statistics [CrossCorrelation]?  

alias(FFT = DiscreteTransforms[FourierTransform], IFFT = DiscreteTransforms[InverseFourierTransform]);

nd := Statistics:-Sample(Normal(0, 1));

 xcorr := proc (x, y)
local corrLength, c;
corrLength := op(1, x)+op(1, y)-1;
c := IFFT(`~`[`*`](FFT(Vector(corrLength, x, fill = 0), normalization = none), `~`[conjugate](FFT(Vector(corrLength, y, fill = 0...

Hey there i have written the following code and it gets very slow cause of the output at each step, which is not needed. I only need the arrays at the end of the procedure. Has someone an idea how i can suppress the output for the steps betweend the start and the end of the procedure?

restart:
s_1 := 0.779e-1*t^2-.1345*t+.2031:
s_2 := 1.3502*t-6.8742:
s_3 := .1112*t^2-1.5108*t+11.527:
s_4 := 1.9322*t-15.099:
s_5 := -0.178e-1*t^2+2.648*t-22.312:

Hey there,

if sometimes problems with my procedures, so i´m looking for a command which shows me the what the procedure is doing.

The command i´m looking for makes a green output :P. Sadly i forget the command; maybe someone can help me.

Best regards

I am trying to integrate the following expression in Maple. It produces the correct result, but not in the format that I want.

BesselProblem := BesselJ(0, BesselJZeros(0, 1)*r)*BesselJ(2, BesselJZeros(0, 1)*r)*r^3;

int(BesselProblem, r = 0 .. 1);

returns the expression

Hi everyone,

I've been able to generate equations of motion for my system. I want to linearize the obtained equations. How to do it? I've been trying to find some example on it, however, haven't been lucky as yet. Can anyone please help me with this? Anticipating a quick reply!

Regards,

Moazzam

i have a problem in resolving this 5 equations eqn1 := (product(1-tau(i), i = 1 .. 4).delta.Delta.tau(0))*(1+(1/16)*(sum((16-j+1)/(g(0))(j), j = 1 .. 16))+(1-product(1-tau(i), i = 1 .. 4).delta.Delta).(1+(1/16)*(sum((16-j+1)/(g(0))(j), j = 1 .. 16)))+(1-product(1-tau(i), i = 1 .. 4).delta.Delta)^2.(1+(1/32)*(sum((32-j+1)/(g(0))(j), j = 1 .. 32)))+(1-product(1-tau(i), i = 1 .. 4).delta.Delta)^3.(1+(1/32)*(sum((32-j+1)/(g(0))(j), j = 1 .. 32)))+(1-product(1-tau(i), i = 1 .. 4...

I wrote the procedure below and i want to plot on one graph for the range lambda = 0 to 60 (x-axis),  beta = 0, beta = 5, beta =10, beta = 15, beta = 20 etc. 

in other words i want to plot Cp vs lambda at different beta values

Can any one assist me in doing this.

_______________________________________________________________________

Cplot := proc (beta, lambda)

local lambda0, Cp;

lambda0 := 0.22e-1*beta^2+(7/1000000000000000)*beta+5.6;

Okay, so I think this is simple, but I cannot find the command.

I get a numeric solution for a system of ODEs, with variables a function of t. Now, I know I can use the sol(t) command to give me the values of my variables at specific values of t. But, how do I get the values of t for specific variable values. There has to be a more efficient way than just plugging in values for t until I come to the answer.

Thanks!

Hi,

I'm currently having some issues while trying to find a way of getting the CPU usage inside Maple.

Is there any existing Maple function that will return the percetage of the CPU usage ?

Basically I'd just like to know how to get x to temporarily equal a specified value, i.e:

if T[2]=(2x^2)-1

how do I find T[2] is x=2?

Thanks for any replies

I have Zipped 2 equations together to equate their equivalent Coefficients.  I now need to assign solve the list fot each value of N (1...9) How do I get Maple to do this reliably for the list as N 1..9 does not necessarily occour in sequence.

what is the difference between the autocorrelation function of Maple and MatLab function xcorr?

> N := 1024;
> f1 := 1;
> FS := 200;
> n := Vector([`$`(0 .. N-1)]);
> x := evalf(`~`[sin](2*Pi*f1*n/FS));
> t := Vector([`$`(1 .. N)]/FS);
> plot(t, x, axes = box, gridlines, color = blue, title = "Sinwave of frequency 1000Hz [FS=8000Hz]", labels = ["Time, [s]",

"Amplitude"], labeldirections = ["horizontal", "vertical"]);